Piping construction

Abstract

This provides a piping structure that facilitates the connection of manifold joints to pipe materials. [Solution] The piping structure 1 comprises a joint body 24 having a vertical pipe connection portion 16 at its upper end that can be connected to a vertical pipe P1, a manifold joint 10 having a horizontal pipe connection portion 17 that protrudes from the outer surface of the joint body and can be connected to a horizontal pipe P3, an extension vertical pipe 30 connected to the lower end of the joint body, a joint cover 35 that covers the manifold joint, an extension cover 40 that covers the extension vertical pipe, and a floor slab 103 in which a through hole 103a is formed and at least a part of the joint cover and the extension cover as a whole is located inside, the lower end of the extension vertical pipe is flush with the lower surface of the floor slab or protrudes downward from the lower surface of the floor slab.

Description

Technical Field

[0001] The present invention relates to a piping structure.

Background Art

[0002] Conventionally, a joint with a cover in which an upper cover and a lower cover are wound around a header joint has been known (see, for example, Patent Document 1). In a header joint, a horizontal pipe connection portion is provided in a joint body. The horizontal pipe connection portion penetrates the upper cover.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] This type of joint with a cover is used in multi-story buildings (buildings) such as condominiums and hotels. In a multi-story building, adjacent floors in the vertical direction are partitioned by a floor slab. A slab hole (through hole) is formed in the floor slab. A part of the joint with a cover is disposed in the slab hole of the floor slab, and the slab hole is filled back with a filling material such as mortar. In recent years, resin header joints have been used from the viewpoints of workability and durability. A cover is wound around the header joint so that sounds and vibrations generated when water flows through the resin header joint do not leak to the outside.

[0005] However, when the floor slab is thick or when the horizontal pipe is constructed above the floor slab at a distance, the length of the portion below the horizontal pipe in the header joint becomes insufficient. That is, the lower end of the header joint does not protrude below the floor slab. In this case, it becomes difficult to connect to the pipe material below the header joint. In this context, "connecting to a pipe" means not only directly connecting to the pipe, but also connecting to the pipe via other components.

[0006] This invention has been made in view of the above problems, and aims to provide a piping structure that facilitates the connection of manifold joints to pipe materials. [Means for solving the problem]

[0007] To solve the aforementioned problems, this invention proposes the following means. The piping structure of the present invention comprises a joint body having a vertical pipe connection portion at its upper end that can be connected to a vertical pipe, a manifold joint having a horizontal pipe connection portion that protrudes from the outer surface of the joint body and can be connected to a horizontal pipe, an extension vertical pipe connected to the lower end of the joint body, a joint cover that covers the manifold joint, an extension cover that covers the extension vertical pipe, and a floor slab having a through hole formed inside which at least a part of the joint cover and the extension cover as a whole are disposed, wherein the lower end of the extension vertical pipe is either flush with the lower surface of the floor slab or protrudes downward from the lower surface of the floor slab.

[0008] In this invention, a manifold pipe joint to which vertical and horizontal pipes can be connected can be covered by a joint cover. An extension vertical pipe connected to the joint body can be covered by an extension cover. At this time, at least a part of the joint cover and the extension cover as a whole is positioned inside the through-hole in the floor slab, and the lower end of the extension vertical pipe is flush with the lower surface of the floor slab or protrudes downward from the lower surface of the floor slab. Therefore, it is easy to connect pipe materials to the extension vertical pipe from below the floor slab. Consequently, it is easy to connect the manifold pipe joint to pipe materials via the extension vertical pipe.

[0009] Furthermore, in the piping structure described above, the upper end of the extension cover may be positioned between the joint body and the joint cover. In this invention, water flowing over the outer surface of the joint cover flows downward from this surface and easily flows over the outer surface of the extension cover. This prevents the water from flowing into the inside of the extension cover.

[0010] Furthermore, in the piping structure described above, the extension vertical pipe may include a first straight pipe connected to the lower end of the joint body, a second straight pipe positioned below the first straight pipe, and a connecting pipe whose lower end of the first straight pipe and the upper end of the second straight pipe are positioned inside and which is connected to the first straight pipe and the second straight pipe, respectively. In this invention, when the lower end of the second straight pipe is inserted into the pipe material, the connecting pipe locks onto the upper end surface of the pipe material from above. This prevents the second straight pipe from being inserted too far into the pipe material, thus preventing damage to the pipe material.

[0011] Furthermore, in the piping structure described above, the joint cover and the extension cover may be butted together in the vertical direction or arranged with a gap between them in the vertical direction, and a sealing member may be provided to cover the joint cover and the extension cover. In this invention, the sealing member can prevent water from flowing through the gap between the joint cover and the extension cover.

[0012] Furthermore, in the piping structure described above, the joint cover and the extension cover are arranged with a gap between them in the vertical direction, and the portion of the joint body and the extension vertical pipe located between the joint cover and the extension cover in the axial direction of the joint body is defined as the gap portion. In this case, the structure may include a lower sealing member that covers the extension cover and the gap portion, and an upper sealing member that covers the joint cover and the lower sealing member. In this invention, the flow of water through the joint body or the extension vertical pipe and the extension cover is suppressed by the lower sealing member, and the flow of water through the joint cover and the lower sealing member is suppressed by the upper sealing member. [Effects of the Invention]

[0013] In the piping structure of the present invention, it is possible to facilitate the connection of the manifold joint to the pipe material.

Brief Description of the Drawings

[0014] [Figure 1] FIG. 8 is a front view of a part of the piping structure according to the first embodiment of the present invention, with a portion broken away. [Figure 2] FIG. 11 is a front view of a main part of the piping structure according to the second embodiment of the present invention, with a portion broken away. [Figure 3] FIG. 14 is a front view of a main part of the piping structure according to the third embodiment of the present invention, with a portion broken away. [Figure 4] FIG. 17 is a front view of a main part of the piping structure of a modification of the embodiment of the present invention, with a portion broken away.

Mode for Carrying Out the Invention

[0015] (First Embodiment) Hereinafter, a first embodiment of the piping structure according to the present invention will be described with reference to FIG. 1. As shown in FIG. 1, the piping structure 1 of the present embodiment is used in a multi-story building (building) 101. In the multi-story building 101, a plurality of floors 102 are stacked in the vertical direction. The floor slab 103 partitions between the plurality of floors 102 (that is, the upper floor and the lower floor). The floor slab 103 has a slab hole (through hole) 103a penetrating in the vertical direction. The piping structure 1 includes a manifold joint 10, an extended vertical pipe 30, a joint cover 35, an extended cover 40, and the floor slab 103.

[0016] Here, the manifold joint 10, the extension vertical pipe 30, the joint cover 35, and the extension cover 40 are each formed in a cylindrical shape. The central axes (axial lines) of the manifold joint 10, the extension vertical pipe 30, the joint cover 35, and the extension cover 40 are arranged coaxially with the common axis. Hereinafter, the common axis is referred to as axis O1, and the direction along axis O1 is referred to as the O1-axis direction. The manifold joint 10, the extension vertical pipe 30, the joint cover 35, and the extension cover 40 are arranged along the vertical direction of axis O1. Note that these may be arranged such that axis O1 is inclined with respect to the vertical direction.

[0017] Among the O1-axis direction, the side of the lower connecting pipe 12 with respect to the upper connecting pipe 11 described later is referred to as downward Z1, and the side of the upper connecting pipe 11 with respect to the lower connecting pipe 12 is referred to as upward Z2. When viewing the piping structure 1 from the vertical direction, the direction orthogonal to axis O1 is referred to as the radial direction, and the direction of circulating around axis O1 is referred to as the circumferential direction. However, the downward Z1 and upward Z2 in the figure are for conveniently indicating the directions, and are originally the directions with respect to the reference.

[0018] The shape of the manifold joint 10 is not particularly limited as long as it has a vertical pipe connection portion 16 and a horizontal pipe connection portion 17 described later. For example, the manifold joint 10 has an upper connecting pipe 11 and a lower connecting pipe 12.

[0019] The upper connecting pipe 11 has an upper main body 15, a vertical pipe connection portion 16, and a horizontal pipe connection portion 17. The upper main body 15 is cylindrical. Note that the upper main body 15 may be cylindrical such as a rectangular tube. Inside the upper main body 15, a vertical rib 15a extending in the vertical direction is provided. The vertical rib 15a is arranged avoiding the opening on the proximal side of the horizontal pipe connection portion 17. A plurality of ribs (not shown) may be provided on the outer peripheral surface of the upper main body 15. The plurality of ribs protrude radially outward from the upper main body 15. For example, three ribs spaced apart from each other in the O1-axis direction are arranged in four sets spaced apart from each other in the circumferential direction. The four sets of ribs are arranged at equal intervals in the circumferential direction. The radial size of each rib is not particularly limited. When installing the manifold pipe joint 10 in the multi-story building 101, the manifold pipe joint 10 is held in place by support fittings (not shown) that abut against multiple ribs from the radially outer side.

[0020] In this example, the vertical pipe connection 16 is a socket. The vertical pipe connection 16 is provided at the upper end of the upper body 15. The vertical pipe connection 16 can be connected to the first vertical pipe (vertical pipe) P1. The first vertical pipe P1 is a pipe made of resin such as polyethylene or polyvinyl chloride. The lower end of the first vertical pipe P1 is located inside the vertical pipe connection 16. Preferably, the vertical pipe connection 16 is provided with a stopper that restricts the first vertical pipe P1 from moving downward Z1, and a sealing member that watertightly seals the space between the first vertical pipe P1 and the vertical pipe connection 16. The vertical pipe connection can also be a socket, flange, or the like.

[0021] The horizontal pipe connection portion 17 protrudes radially outward from the outer circumferential surface of the upper body 15. In this example, the horizontal pipe connection portion 17 is a socket. In this embodiment, the manifold joint 10 has two horizontal pipe connection portions 17. The directions in which the two horizontal pipe connection portions 17 extend form a 90° angle in plan view. The number of horizontal pipe connection parts 17 in the manifold joint 10 may be one or three or more. The horizontal pipe connection parts may be spigots, flanges, etc.

[0022] The horizontal pipe connection section 17 comprises a connection section body 17a and a receiving unit 17b. The connection section body 17a is cylindrical and protrudes radially outward from the outer circumferential surface of the upper body 15. Hereinafter, the portion of the upper body 15 (joint body 24, which will be described later) on which the horizontal pipe connection section 17 is provided will be referred to as the connection section installation portion 15b. The socket unit 17b can be attached to and detached from the connector body 17a. The socket unit 17b can be connected to the horizontal pipe P3. The horizontal pipe P3 is constructed in the same manner as the first vertical pipe P1, except that its outer diameter is smaller than that of the first vertical pipe P1. The horizontal pipe P3 has a water slope and is arranged almost along a horizontal plane. The end of the horizontal pipe P3 is located inside the socket unit 17b. It is preferable that a stopper and a sealing member are provided inside the socket unit 17b, similar to the vertical pipe connector 16. The receiving unit 17b may be integrated with the connecting unit body 17a.

[0023] The upper body 15, vertical ribs 15a, vertical pipe connection part 16, and connection part body 17a that constitute the upper connecting pipe 11 are formed by integrally molding a resin composition by injection molding or the like. Examples of resins constituting the resin composition include polyethylene resins, polyolefin resins such as polypropylene resins, ABS resins, and polyvinyl chloride resins, with polyvinyl chloride resins being preferred. "Polyolefin resin" means a resin consisting solely of polyolefin, or, in the case of a resin containing multiple types of resins, a resin in which the most abundant resin by mass is polyolefin. Similarly, "polyvinyl chloride resin" means a resin consisting solely of polyvinyl chloride, or, in the case of a resin containing multiple types of resins, a resin in which the most abundant resin by mass is polyvinyl chloride.

[0024] A fire-resistant material containing a thermal expansion material may be provided on the outer or inner surface located within the slab hole 103a of the upper connecting pipe 11. The thermal expansion material can be any material that expands due to the heat generated during a fire, for example, thermally expandable graphite. When the fire-resistant material is provided on the outer surface of the upper connecting pipe 11, it can be provided by wrapping a sheet-shaped fire-resistant material around it. When the fire-resistant material is provided on the inner surface of the upper connecting pipe 11, it can be provided by placing a cylindrical tubular fire-resistant material inside the lower part of the upper connecting pipe 11. The cylindrical tubular fire-resistant material will be described in detail below.

[0025] The lower connecting pipe 12 has an inclined pipe section 20 and a pipe connection section 21. The upper body 15, the vertical pipe connection section 16, the inclined pipe section 20, and the pipe connection section 21 constitute the joint body 24. The axis O1 is also the axis of the joint body 24. The vertical pipe connection section 16 has a vertical pipe connection section 16 at its upper end. The inclined pipe section 20 is cylindrical in shape, with its outer and inner diameters decreasing as it approaches the downward Z1 direction. Inside the inclined pipe section 20, a flow straightening plate 20a extending in the vertical direction is provided. For example, the inclined pipe section 20 is manufactured by injection molding a resin composition. Examples of resins that can make up the inclined pipe section 20 include polyolefin resins and polyvinyl chloride resins, with polyvinyl chloride resins being preferred. Polyvinyl chloride resins allow for more reliable sealing of the pipeline in the event of a fire.

[0026] A fire-resistant material 18 containing a thermal expansion material may be provided on the outer or inner surface located within the slab hole 103a of the lower connecting pipe 12. The thermal expansion material can be any material that expands due to the heat generated during a fire, for example, thermally expandable graphite. When the fire-resistant material is provided on the outer surface of the lower connecting pipe 12, it can be provided by wrapping a sheet-shaped fire-resistant material around it. When the fire-resistant material is provided on the inner surface of the lower connecting pipe 12, it can be provided by placing a cylindrical tubular fire-resistant material 18 inside the upper part of the lower connecting pipe 12. The fire-resistant material 18 may be provided in both the upper connecting pipe 11 and the lower connecting pipe 12, or it may be provided in an area that spans the lower part of the upper connecting pipe 11 and the upper part of the lower connecting pipe 12.

[0027] The fire-resistant material 18, which is molded into a cylindrical tubular shape, may be a single-layer structure consisting of a single resin composition as the whole, or a multi-layer structure consisting of multiple layers. If the fire-resistant material 18 has a multi-layer structure, it is sufficient that any of the layers are formed from a resin composition containing a thermal expansion agent. For example, if the fire-resistant material 18 has a three-layer structure consisting of a surface layer, an intermediate layer, and an inner layer, the intermediate layer may be formed from a resin composition containing a thermal expansion agent.

[0028] The surface layer, intermediate layer, and inner layer may contain a heat-absorbing agent. Examples of heat-absorbing agents include inorganic hydroxides such as magnesium hydroxide, aluminum hydroxide, kaolin-based minerals (kaolinite, halloysite, dickite), and hydrotalsalsite, as well as water-absorbing inorganic compounds such as sepiolite, bentonite, montmorillonite, talc, mica, quartz, zeolite, wollastonite, and nepheline siyanite.

[0029] If the intermediate layer contains thermally expandable graphite, the intermediate layer will appear black. Therefore, it is preferable to include a coloring agent other than black in the surface layer and inner layer so that they can be distinguished from the intermediate layer. The thickness of the surface layer and the inner layer is preferably 0.3 mm to 3.0 mm, and more preferably 0.6 mm to 1.5 mm. If the thickness of the coating layers, which are the surface layer and the inner layer, is 0.3 mm or more, sufficient mechanical strength of the inclined pipe section 20 as a pipe can be ensured. If the thickness of the coating layer is 3.0 mm or less, a decrease in the fire resistance of the inclined pipe section 20 can be suppressed. Furthermore, the inclined pipe section 20 is preferably one that meets the performance requirements specified in JIS K6741, for rigid polyvinyl chloride pipes.

[0030] In this example, the pipe connection portion 21 is a socket. The pipe connection portion 21 is provided at the lower end of the inclined pipe portion 20. The pipe connection section 21 is made of the same material as the upper connecting pipe 11. The pipe connection section may also be a spout, flange, or the like. The upper connecting pipe 11 and the lower connecting pipe 12 are manufactured separately, and the upper body 15 and the inclined pipe section 20 are connected to each other by adhesive or the like. The manifold joint 10, configured as described above, is made of resin. In other words, in this embodiment, the manifold joint 10 is constructed by connecting two members, connecting pipes 11 and 12, to each other. The manifold joint 10 may be composed of one member or of three or more members.

[0031] The extension vertical pipe 30 is connected to the lower end (pipe connection part 21) of the joint body 24. The extension vertical pipe 30 has a first straight pipe 31, a second straight pipe 32, and a connecting pipe 33. The first straight pipe 31 and the second straight pipe 32 are pipes configured in the same way as the first vertical pipe P1. However, the lengths of the first straight pipe 31 and the second straight pipe 32 are shorter than the length of the first vertical pipe P1. The outer diameters of the first straight pipe 31 and the second straight pipe 32 are equal to each other, and the inner diameters of the first straight pipe 31 and the second straight pipe 32 are equal to each other. The first straight pipe 31 and the second straight pipe 32 are arranged coaxially with axis O1. The first straight pipe 31 is connected to the pipe connection part 21 of the manifold joint 10. The second straight pipe 32 is positioned below the first straight pipe 31 at a height Z1, with a vertical gap between them.

[0032] The connecting pipe 33 is a so-called socket and has a body 33a and a stopper 33b. The body 33a is formed in a cylindrical shape and is arranged coaxially with the axis O1. The outer diameter of the body 33a is larger than the outer diameters of the first straight pipe 31 and the second straight pipe 32. The stopper 33b is formed in an annular shape. The stopper 33b is fixed to the middle of the inner circumferential surface of the main body 33a in the vertical direction. The lower end of the first straight pipe 31 is located inside the part of the main body 33a above the stopper 33b Z2. The first straight pipe 31 is locked to the stopper 33b from above Z2. The upper end of the second straight pipe 32 is located inside the part of the main body 33a below the stopper 33b Z1. The second straight pipe 32 is locked to the stopper 33b from below Z1. As described above, the connecting pipe 33 is connected to the first straight pipe 31 and the second straight pipe 32, respectively.

[0033] The joint cover 35 covers the manifold joint 10 from the radially outer side. The configuration of the joint cover 35 is not limited. For example, the joint cover 35 may have a joint sound-absorbing cover 36 and a joint sound-insulating cover 37. The joint sound-absorbing cover 36 is formed in a sheet shape that becomes flat when unfolded. The joint sound-absorbing cover 36 is wrapped around the joint body 24 and covers the joint body 24 from the radial outside. The joint sound-absorbing cover 36 is cylindrical. The joint sound-absorbing cover 36 has a sound-absorbing through-hole 36a for passing the horizontal pipe connection part 17 through.

[0034] The joint sound-absorbing cover 36 is formed from, for example, needle felt. For example, needle felt contains 40% to 50% polyethylene terephthalate, 35% to 45% acrylic fibers, and 10% to 20% wool or rayon. In manufacturing needle felt, barbed needles are inserted into the felt to mechanically entangle the fibers. The joint sound-absorbing cover 36 may also be formed from felt such as thermal felt or PET felt, or from an acrylic fiber mixture, glass wool, rock wool, or polyurethane foam. The density of the joint sound-absorbing cover 36 is 80 kg / m³. 3 The above is preferable. The thickness of the joint sound-absorbing cover 36 is preferably about 10 mm.

[0035] The joint sound insulation cover 37 is formed in a sheet shape that becomes flat when unfolded. The joint sound insulation cover 37 is wrapped around the joint sound absorption cover 36 and covers the joint sound absorption cover 36 from the radial outside. The joint sound insulation cover 37 is cylindrical. The joint sound insulation cover 37 is in direct contact with the outer surface of the joint sound absorption cover 36. The joint sound insulation cover 37 has a sound insulation through-hole 37a for passing the horizontal pipe connection part 17 through. The sound absorption through-hole 36a and the sound insulation through-hole 37a of the joint sound absorption cover 36 constitute the cover through-hole 35a of the joint cover 35. The horizontal pipe connection portion 17 is positioned inside the cover through hole 35a formed in the joint cover 35.

[0036] The joint sound insulation cover 37 is preferably made of synthetic rubber such as modified asphalt, elastomer, polyolefin resin, or soft polyvinyl chloride resin. The joint sound insulation cover 37 may also contain inorganic materials such as calcium carbonate or barium sulfate, metal sheets such as iron or lead, or metal powder. The thickness of the joint sound insulation cover 37 is preferably 1.0 mm to 5.0 mm, and more preferably 1.5 mm to 4.0 mm. Furthermore, a surface material such as synthetic fiber nonwoven fabric or glass fiber nonwoven fabric may be laminated on one or both sides of the joint sound insulation cover 37.

[0037] The joint sound insulation cover 37 may be formed from an elastic resin material, such as an olefin-based material (a resin composition containing 300 to 600 parts by weight of inorganic filler per 100 parts by weight of olefin-based resin). The thickness of the joint sound insulation cover 37 is preferably about 1 to 5 mm, and more preferably about 2 mm. The surface density of the joint sound insulation cover 37 is 1 to 8 kg / m². 2 Preferably, it is 3.4 kg / m 2 It is preferable to have a degree of saturation.

[0038] The inorganic fillers mentioned above are not particularly limited, but examples include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, donnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balloons, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloons, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dewatered sludge, etc. Of these, calcium carbonate is preferred as the inorganic filler due to the balance between weight and cost. These may be used individually or in a mixture of two or more.

[0039] The olefin resin is not particularly limited, but examples include low-density polyethylene (PE), high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, and poly-αolefin. In particular, those with a density of 0.87 to 0.93 g / cm³ are available. 3 Polyethylene is preferred as the olefin resin. Its density is 0.87 g / cm³. 3 If it is less than 0.93 g / cm², the strength of the joint sound insulation cover 37 is insufficient. 3 If it exceeds this value, there is a risk that the joint sound insulation cover 37 may buckle when flattened. Also, if the flexural modulus of the olefin resin is 100 to 3000 kg / cm 2 Therefore, it is sufficient in terms of strength and processability. The joint sound insulation cover 37 may be made of a material other than the olefin-based material, for example, polyvinyl chloride resin, polystyrene resin, ABS resin, AS resin, thermoplastic elastomer (TPE) or other elastomer material may be used.

[0040] The joint cover 35 configured as described above has a double structure comprising a joint sound-absorbing cover 36 and a joint sound-insulating cover 37. For example, the lower end of the joint cover 35 is located in the middle of the pipe connection portion 21 in the vertical direction.

[0041] The extension cover 40 covers the extension vertical pipe 30 from the radially outer side. The configuration of the extension cover 40 is not limited. For example, the extension cover 40 may include an extension sound-absorbing cover 41 and an extension sound-insulating cover 42. The extension sound-absorbing cover 41 is formed in a sheet-like shape that becomes flat when unfolded. The extension sound-absorbing cover 41 is wrapped around the extension vertical tube 30 and covers the extension vertical tube 30 from the radial outside. The extension sound-absorbing cover 41 is cylindrical. The material, thickness, etc. of the extension sound-absorbing cover 41 are configured in the same way as the joint sound-absorbing cover 36. The extension sound insulation cover 42 is formed in a sheet shape that becomes flat when unfolded. The extension sound insulation cover 42 is wrapped around the extension sound absorption cover 41 and covers the extension sound absorption cover 41 from the radial outside. The extension sound insulation cover 42 is cylindrical. The extension sound insulation cover 42 is in direct contact with the outer surface of the extension sound absorption cover 41. The material, thickness, etc. of the extension sound insulation cover 42 are configured in the same way as the joint sound insulation cover 37.

[0042] The extension cover 40 configured as described above has a double structure having an extension sound-absorbing cover 41 and an extension sound-insulating cover 42. The upper end of the extension cover 40 is positioned between the joint body 24 and the lower end of the joint cover 35. For example, the upper end of the extension cover 40 is located at the upper end of the pipe connection 21. The lower end of the extension cover 40 is located at the lower end of the extension vertical pipe 30.

[0043] For example, in the piping structure 1, the lower Z1 portion of the joint cover 35 and the upper Z2 portion of the extension cover 40 are located inside the slab hole 103a of the floor slab 103. It is sufficient that at least a portion of the joint cover 35 and the extension cover 40 as a whole are located inside the slab hole 103a of the floor slab 103. The lower end of the extension vertical pipe 30 protrudes downward Z1 from the lower surface of the floor slab 103. In other words, the upper Z2 portion of the extension vertical pipe 30 is located within the slab hole 103a of the floor slab 103. The lower end of the extension vertical pipe 30 (second straight pipe 32) may be flush with the underside of the floor slab 103. A filler material 104, such as mortar, is filled between the opening periphery of the slab hole 103a in the floor slab 103 and the piping structure 1.

[0044] In this example, the second straight pipe 32 is connected to a straight pipe (pipe material) 45 with a socket. The straight pipe 45 has a straight pipe section 46, a connecting section 47, and a sealing member 48. The straight pipe section 46 extends vertically below the extension vertical pipe 30 at a point Z1. The inner diameter of the straight pipe section 46 is smaller than the outer diameter of the second straight pipe 32 of the extension vertical pipe 30. The connecting portion 47 is formed in a cylindrical shape and is fixed to the upper end of the straight pipe portion 46. The inner diameter of the connecting portion 47 is larger than the inner diameter of the straight pipe portion 46. The lower Z1 portion of the second straight pipe 32 is located inside the connecting portion 47. The sealing member 48 is provided on the inner circumferential surface of the connecting portion 47. The sealing member 48 provides a watertight seal between the connecting portion 47 and the sealing member 48. The main body 33a of the extension vertical pipe 30 is locked to the connection part 47 from above Z2 above the connection part 47.

[0045] In addition, within the multi-story building 101, drainage facilities such as toilets (not shown) are provided in layer 102, which is Z2 above the floor slab 103. The drainage facilities are connected to the first vertical pipe P1 and the horizontal pipe P3.

[0046] Next, we will explain the operation of the piping structure 1 configured as described above. Drainage water flows from the drainage system into the manifold joint 10 through the first vertical pipe P1 and the horizontal pipe P3. The drainage water flows downward towards Z1 within the manifold joint 10, hitting the vertical ribs 15a and the flow straightening plate 20a. The drainage water flows from the manifold joint 10 into the second vertical pipe P5 through the extension vertical pipe 30 and is drained as needed. The noise generated when wastewater flows through the manifold joint 10 and extension vertical pipe 30 is less likely to leak to the outside of the joint cover 35 and extension cover 40 due to the joint cover 35 and extension cover 40.

[0047] As described above, in the piping structure 1 of this embodiment, the manifold joint 10 to which the first vertical pipe P1 and horizontal pipe P3 can be connected can be covered by the joint cover 35. The extension vertical pipe 30 connected to the joint body 24 can be covered by the extension cover 40. At this time, the lower Z1 portion of the joint cover 35 and the upper Z2 portion of the extension cover 40 are positioned inside the slab hole 103a of the floor slab 103, and the lower end of the extension vertical pipe 30 protrudes downward Z1 from the lower surface of the floor slab 103. Therefore, it is easy to connect the straight pipe 45 with a socket to the extension vertical pipe 30 from below Z1 from the floor slab 103. Accordingly, it is easy to connect the manifold joint 10 to the straight pipe 45 with a socket via the extension vertical pipe 30.

[0048] The upper end of the extension cover 40 is positioned between the joint body 24 and the joint cover 35. As shown in Figure 1, water W flowing on the radially outer surface 35b of the joint cover 35 flows downward Z1 from this surface 35b and easily flows on the radially outer surface of the extension cover 40. This prevents the water W from flowing into the radially inner side of the extension cover 40. The extension vertical pipe 30 includes a first straight pipe 31, a second straight pipe 32, and a connecting pipe 33. When the lower end of the second straight pipe 32 is inserted into the straight pipe with socket 45, the connecting pipe 33 locks onto the upper end surface of the straight pipe with socket 45 from above Z2. This prevents the straight pipe with socket 45 from being damaged by the second straight pipe 32 being inserted too far into it.

[0049] (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to Figure 2. The same reference numerals are used for parts identical to those in the previous embodiment, and their descriptions will be omitted. Only the differences will be described. As shown in Figure 2, the piping structure 2 of this embodiment includes a sealing member 55 in addition to the components of the piping structure 1 of the first embodiment. In this embodiment, the joint cover 35 and the extension cover 40 are butted together in the vertical direction. The sealing member 55 is formed in a cylindrical shape. The sealing member 55 is made of synthetic rubber such as butyl rubber (butyl tape) or ethylene propylene diene rubber (EPDM). The sealing member 55 covers the lower end of the joint cover 35 and the upper end of the extension cover 40 from the radially outer side.

[0050] In the piping structure 2 of this embodiment, configured in this way, the manifold joint 10 can be easily connected to the straight pipe 45 with a socket. Furthermore, the sealing member 55 can prevent water from flowing through the gap between the joint cover 35 and the extension cover 40. The joint cover 35 and the extension cover 40 may be arranged with a gap between them in the vertical direction.

[0051] (Third embodiment) Next, a third embodiment of the present invention will be described with reference to Figure 3. The same reference numerals are used for parts identical to those in the previous embodiments, and their descriptions will be omitted. Only the differences will be described. As shown in Figure 3, the piping structure 3 of this embodiment includes a lower sealing member 60 and an upper sealing member 61 in addition to the components of the piping structure 1 of the first embodiment. In this embodiment, the joint cover 35 and the extension cover 40 are arranged with a gap between them in the vertical direction.

[0052] The lower sealing member 60 and the upper sealing member 61 are each formed in a cylindrical shape and are made of the same material as the sealing member 55. Here, the portion of the joint body 24 and the extension vertical pipe 30 located between the joint cover 35 and the extension cover 40 in the vertical direction is defined as the gap portion 10a. The lower sealing member 60 covers the upper end of the extension cover 40 and the gap portion 10a from the radially outer side. The upper sealing member 61 covers the lower end of the joint cover 35 and the portion of the lower sealing member 60 corresponding to the gap portion 10a in the vertical direction, from the radially outer side.

[0053] In the piping structure 3 of this embodiment, configured in this way, the manifold joint 10 can be easily connected to the straight pipe 45 with a socket. Furthermore, the lower sealing member 60 can suppress the flow of water between the extension vertical pipe 30 and the extension cover 40, and the upper sealing member 61 can suppress the flow of water between the joint cover 35 and the lower sealing member 60.

[0054] Although the first to third embodiments of the present invention have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments, and modifications, combinations, deletions, etc., of the configurations are also included without departing from the spirit of the present invention. Furthermore, it goes without saying that each of the configurations shown in each embodiment can be used in appropriate combinations. For example, as shown in the piping structure 1A in Figure 4, the extension cover 40A may consist only of the extension sound insulation cover 42. The extension cover 40A has a single-layer structure with the extension sound insulation cover 42. This configuration is possible because, generally, no rectifier plates or the like are provided inside the extension vertical pipe 30, so the sound generated inside the extension vertical pipe 30 is quieter than the sound generated inside the manifold joint 10. The piping structures 2 and 3 are the same as those for piping structure 1A.

[0055] Furthermore, in the first to third embodiments described above, the cover may have an upper cover and a lower cover. In this case, the upper cover covers the connection portion installation portion 15b and the portion above the connection portion installation portion 15b Z2 of the joint body 24 from the radially outer side. The lower cover covers the portion below Z1 of the joint body 24 that is covered by the upper cover. The extension vertical pipe 30 is described as having a first straight pipe 31, a second straight pipe 32, and a connecting pipe 33, but the configuration of the extension vertical pipe is not limited to this. The extension vertical pipe may be composed of a single straight pipe or the like. In the first to third embodiments described above, the piping structures 1, 2, and 3 do not necessarily have to include the longitudinal ribs 15a and the flow straightening plates 20a.

[0056] Furthermore, in the first embodiment described above, the lower end of the extension cover 40 was located at the lower end of the extension vertical pipe 30. However, the lower end of the extension cover 40 may be located between the lower end of the connecting pipe 33 and the lower end of the first straight pipe 31, or at the lower end of the connecting pipe 33, or between the upper and lower ends of the connecting pipe 33. In these cases, a pipe sound insulation cover may be provided on the outer surface of the manifold joint 10 or the outer surface of the straight pipe 45 with a socket, located below the extension cover 40 Z1. This pipe sound insulation cover may overlap the lower end of the extension cover 40, or it may be provided so that the end face of the pipe sound insulation cover and the end face of the lower end of the extension cover 40 are in contact with each other. [Explanation of Symbols]

[0057] 1,1A,2,3 Piping Structure 10. Manifold joint 10a Gap 16 Vertical pipe connection 17 Horizontal pipe connection 24 Fitting body 30 Extension vertical pipes 31 1st straight pipe 32 2nd straight pipe 33 Connecting pipe 35 Fitting cover 40, 40A extension cover 60 Lower sealing member 61 Upper sealing member 103 Floor slab 103a Slab hole (through hole) O1 axis

Claims

1. A joint body having a vertical pipe connection portion at its upper end that can be connected to a vertical pipe, and a manifold joint having a horizontal pipe connection portion that protrudes from the outer surface of the joint body and can be connected to a horizontal pipe, An extension vertical pipe connected to the lower end of the aforementioned joint body, A joint cover that covers the aforementioned manifold joint, An extension cover that covers the aforementioned extension vertical pipe, A floor slab having a through hole formed in which at least a portion of the joint cover and the extension cover as a whole is disposed inside, Equipped with, The lower end of the extension vertical pipe is either flush with the lower surface of the floor slab or protrudes downward from the lower surface of the floor slab, in this piping structure.

2. The piping structure according to claim 1, wherein the upper end of the extension cover is positioned between the joint body and the joint cover.

3. The aforementioned extension vertical pipe is A first straight pipe connected to the lower end of the joint body, A second straight pipe positioned below the first straight pipe, The lower end of the first straight pipe and the upper end of the second straight pipe are positioned inside, and connecting pipes are connected to the first straight pipe and the second straight pipe, respectively. A piping structure according to claim 1 or 2, having the following features.

4. The aforementioned joint cover and the aforementioned extension cover are either butted together in the vertical direction or arranged with a gap between them in the vertical direction. The piping structure according to any one of claims 1 to 3, further comprising a sealing member that covers the joint cover and the extension cover.

5. The joint cover and the extension cover are arranged with a gap between them in the vertical direction. When the portion of the joint body and extension vertical pipe located between the joint cover and the extension cover in the axial direction of the joint body is defined as the gap portion, The extension cover and the lower sealing member that covers the gap portion, An upper sealing member that covers the joint cover and the lower sealing member, A piping structure according to any one of claims 1 to 3, comprising:

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